using System;

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public class Program

{   

    public static void Main()

    {   

        int round = 0;

        int endgame = 0;

        int player_score = 0;

        int comp_score = 0;

        while (endgame == 0){

            int player = 0;     

            int cpu;

            int valid = 0;

            int endvalid = 0;

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            while(valid == 0){

                Console.WriteLine("Rock / Paper / Scissors?");

                string playerchoice = Console.ReadLine();

                if(playerchoice == "Rock"){

                    valid = 1;

                    player = 0;

                }

                else if(playerchoice == "Paper"){

                    valid = 1;

                    player = 1;

                }

                else if(playerchoice == "Scissors"){

                    valid = 1;

                    player = 2;

                }

                else{

                    Console.WriteLine("Invaild input, please try again");

                }

            }

            cpu = round%3;

            switch(player){

                case 0:                 // player use Rock

                    if(cpu == 0)

                        Console.WriteLine("Computer uses Rock, it is a tie");

                    else if(cpu == 1){

                        Console.WriteLine("Computer uses Paper, you lose");

                        comp_score++;

                    }

                    else{

                        Console.WriteLine("Computer uses Scissors, you win");

                        player_score++;

                    }

                    break;

                case 1:                 // player use Paper

                    if(cpu == 0){

                        Console.WriteLine("Computer uses Rock, you win");

                            player_score++;

                    }

                    else if(cpu == 1)

                        Console.WriteLine("Computer uses Paper, it is a tie");

                    else{

                        Console.WriteLine("Computer uses Scissors, you lose");

                        comp_score++;

                    }

                    break;

                case 2:         // player use Scissors

                    if(cpu == 0){       

                        Console.WriteLine("Computer uses Rock, you lose");

                        comp_score++;

                    }

                    else if(cpu == 1){

                        Console.WriteLine("Computer uses Paper, you win");

                        player_score++;

                    }

                    else

                        Console.WriteLine("Computer uses Scissors, it is a tie");

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                    break;      

                }

            Console.WriteLine("Player: {0} / Computer: {1}",player_score,comp_score);

            round++;

            while (endvalid == 0){

            Console.WriteLine("Do you want to play again [Yes/No]?");

            string again = Console.ReadLine();

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            if(again =="Yes"){

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                endvalid = 1;

            }

            else if(again =="No"){

                Console.WriteLine("Bye");

                endgame = 1;

                endvalid = 1;

            }

            else {

                Console.WriteLine("Invaild input, please try again");}  

            }

           }

        }

}

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